As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SOAP SAMPLE SUBMITTED TO MANUFACTURER DURING A SCHEDULED FILTER REPLACEMENT WHEN ANALYZED WAS RETURNED WITH IMMEDIATE ACTION REQUIRED ON ENGINE, PERFORM SB AS907-72-9045R1 REPLACEMENT OF UPPER TOWER SHAFT BEARING TO PN 3033024-2 OR -4. IT WAS DISCOVERED SB WAS PREVIOUSLY COMPLIED WITH AND -2 BEARING INSTALLED ONLY 800 HOURS PREVIOUS ON LT AND RT ENGINES.